CN217554123U - Speed change mechanism and motorcycle with same - Google Patents

Abstract

The utility model discloses a speed change mechanism, it has one to fix on the automobile body and be annular first fixed disk around an axis, one presses and supports in this first fixed disk and along the ring cover that this axis extends, one set of sliding tray of locating this ring cover, one connect this ring cover and with this sliding tray looks spaced second fixed disk, and a plurality of balls that set up between this first fixed disk and this sliding tray. The first sliding disc is provided with a plurality of cambered surfaces facing the first fixed disc and matched with the first fixed disc to define a plurality of accommodating grooves for the balls to move respectively. From the perspective of a circumferential direction visual angle, each cambered surface is composed of a plurality of rolling line segments which are sequentially connected along the radial direction, and the curvature radiuses of two adjacent rolling line segments are different, so that adjustable speed change is increased, different speed change requirements are met, and the cambered surface is closer to an ideal performance curve.

Description

Transmission mechanism and motorcycle with transmission mechanism

technical field

The utility model relates to a motorcycle, in particular to a motorcycle with a speed change mechanism.

Background technique

Referring to FIG. 1, it is a known drive disk assembly 11, which is arranged on a vehicle body (not shown). The drive plate assembly 11 includes a first fixed plate 111 adapted to be fixed on the vehicle body and in an annular shape around an axis L1, a first fixed plate 111 extending along the axis L1 and defined around the inner circumference of the first fixed plate 111 A ring sleeve 112 of the accommodating space 10 for an engine crankshaft (not shown) to pass through, a sliding plate 113 slidably sleeved on the ring sleeve 112, a ring sleeve 113 suitable for being fixed on the vehicle body and connected The ring sleeve 112 and the second fixed plate 114 spaced apart from the sliding plate 113, and a plurality of second fixed plates 114 disposed between the first fixed plate 111 and the sliding plate 113 and abutting against the first fixed plate along the direction of the axis L1 The disc 111 and the sliding disc 113 and the balls 115 move in the radial direction. The sliding plate 113 has a plurality of arc surfaces 116 facing the first fixed plate 111 and cooperating with the first fixed plate 111 to define a plurality of cavities 110 for the balls 115 to roll respectively. According to the viewing angle in the circumferential direction, the arc surfaces 116 are arc-shaped as shown in FIG. 1 and have the same radius of curvature.

The engine crankshaft can drive the drive plate assembly 11 to rotate around the axis L1. When the rotational speed is low, the centrifugal force generated by the balls 115 is small, and the radial direction along the arc surfaces 116 is closer to the axis. L1, and make the sliding plate 113 adjacent to the first fixed plate 111, so as to increase the distance between the sliding plate 113 and the second fixed plate 114, and then make the distance between the sliding plate 113 and the second fixed plate 114. A belt 12 between them shrinks inward in the radial direction and is adjacent to the axis L1, thereby achieving a state of low gear and high reduction ratio. When the rotational speed is high, the centrifugal force of the balls 115 is large, and the balls 115 are farther away from the axis L1 in the radial direction along the arc surfaces 116, and push the sliding plate 113 to make the sliding plate 113 relative to the first When the fixed plate 111 moves in the direction of the axis L1, the distance between the sliding plate 113 and the second fixed plate 114 is bound to become smaller, so that the belt 12 expands outward in the radial direction away from the axis L1, thereby achieving High gear, low reduction ratio state.

However, the arc surfaces 116 are designed with a single radius of curvature, and there are few adjustment variables, and it is easy to cause a problem that certain sections meet the shifting requirements, while other sections deviate from the shifting requirements, so they can only meet a specific shifting area or completely It does not meet the shifting needs, that is to say, the applicability is poor and cannot meet the needs of wider and precise shifting. For example, the arc surfaces 116 are flatter as they go inward in the radial direction, so that the balls 115 push the sliding plate 113 to a smaller extent, so that the belt 12 expands outward in the radial direction. So small that the motorcycle starts slowly. On the contrary, the arc surfaces 116 become steeper as they go outward in the radial direction, which causes the balls 115 to push the sliding plate 113 to a greater extent, so that the belt 12 expands abruptly to the outside in the radial direction. As for the change of the speed change curve, it is easy to be dangerous, so the above shortcomings need to be improved.

Utility model content

[The problem to be solved by this utility model]

Therefore, the purpose of the present invention is to provide a speed change mechanism with more adjustment speed changes and better applicability.

Furthermore, another object of the present invention is to provide a motorcycle with a speed change mechanism that has more adjustment and speed changes and a more compact vehicle space.

[Technical means to solve the problem]

Therefore, the speed change mechanism of the present invention is suitable for being arranged on a vehicle body and includes a drive disk assembly.

The drive plate assembly rotates around an axis, and has a first fixed plate which is suitable for being fixed on the vehicle body and is annular around the axis, and a first fixed plate extending along the axis from the inner periphery of the first fixed plate a ring sleeve, a sliding plate slidably sleeved on the ring sleeve, a second fixing plate suitable for being fixed on the vehicle body and connected to the ring sleeve and spaced from the sliding plate, and a plurality of The first fixed plate and the sliding plate are used to push the balls of the sliding plate. The sliding plate has a plurality of arc surfaces facing the first fixed plate and cooperating with the first fixed plate to define a plurality of accommodating grooves for the balls to move respectively. From the perspective of the circumferential direction, each arc surface is composed of a plurality of rolling line segments connected in sequence along the radial direction, and the curvature radii of the two adjacent rolling line segments are different.

In some embodiments of the present invention, in each arc surface, at least one tangent line located at the junction of two adjacent rolling line segments is defined, and the at least one tangent line is a common tangent of the corresponding rolling line segments.

In some embodiments of the present invention, the curvature radius of the rolling line segments of each arc surface gradually increases away from the axis in the radial direction.

In some embodiments of the present invention, the arc surfaces are arranged annularly at intervals with the axis as the center.

In some embodiments of the present invention, the speed change mechanism further comprises a driven disk assembly spaced apart from the drive disk assembly along a direction perpendicular to the axis, and a drive disk assembly and the driven disk assembly connected with A speed change transmission member driven by the drive plate assembly to drive the driven plate assembly to rotate.

In some embodiments of the present invention, the sliding plate further has an outer ring facing the second fixed plate and extending radially in a direction away from the second fixed plate and in contact with the speed change transmission member The speed change transmission member is located between the outer annular surface and the second fixed plate.

In addition, the motorcycle of the present invention with a speed change mechanism defines a front-to-rear direction that is perpendicular to the extension direction of the axis and extends back and forth. The motorcycle with a speed change mechanism includes a vehicle body, a drive mechanism arranged on the vehicle body, and the speed change mechanism connected to the drive mechanism.

The driving mechanism includes a driving member disposed on the vehicle body, a driving shaft connected to the driving member and extending along an axis and rotatable with the axis as a rotation axis, a transmission shaft parallel to the driving shaft, and a The gear assembly is connected to the transmission shaft and used to drive the transmission shaft to rotate.

The speed change mechanism is connected to the drive mechanism, and includes the drive plate assembly sleeved on the drive shaft and rotatable with the axis as the axis of rotation, the driven plate assembly spaced from the drive plate assembly along the front-rear direction, and connected to the drive plate assembly. The transmission member of the drive disc assembly and the driven disc assembly. The driven disk assembly has two driven disks with adjustable distance from each other, and a driven shaft parallel to the drive shaft and passing through the driven disks and connected to the gear assembly for driving the transmission shaft to rotate . The trailing edges of the driven discs are located behind the trailing edge of the gear assembly in the front-rear direction. The distance from the leading edge of the driven disks to the axis line of the driven shaft is greater than the distance from the leading edge of the driven disk to the axis line of the drive shaft.

In some embodiments of the present invention, the distance from the axis line of the driving shaft to the axis line of the driven shaft along the front-rear direction is 130-150 mm.

In some embodiments of the present invention, the distance from the axis line of the driving shaft to the axis line of the driven shaft along the front-rear direction is 145 mm.

In some embodiments of the present invention, the motorcycle with a speed change mechanism further includes a rear wheel located behind the driving member, and the front edge of the rear wheel is located at the front edge and the rear of the driven plate along the front-rear direction. Between the edge.

In some embodiments of the present invention, the motorcycle with the speed change mechanism further includes a rocker arm mechanism, the rocker arm mechanism includes at least one rocker arm member connected to the rear wheel, and a rocker member connected to the transmission shaft and the rear wheel , and can drive the rear wheel to rotate.

In some embodiments of the present invention, the flexible transmission member is selected from a belt or a chain.

In some embodiments of the present invention, the driving member is fixed on the vehicle body.

[The effect that the utility model can achieve]

In the drive plate assembly of the speed change mechanism of the present invention, each arc surface is composed of these rolling line segments with different curvature radii, so that the adjustable variable can be increased, so that the speed change performance can be close to the ideal to match the different thrust and Accelerate demand.

In some embodiments of the present invention, the structural design with no step difference between the rolling line segments of each arc surface can ensure the continuity of shifting, reduce wear and improve durability, and prevent shifting failures and increase driving safety.

In some embodiments of the present invention, the design of the curvature radius of the rolling line segments of each camber surface gradually increases outward along the radial direction, which can better meet the speed change requirements of low speed and high speed at the same time, and can also avoid the Speed too slow and wear too fast and other problems, and thereby improve acceleration and durability.

In some embodiments of the present invention, the balls are radially distributed on the sliding plate, thereby improving rotational stability.

In some embodiments of the present invention, different reduction ratios of the vehicle are provided by the cooperation between the transmission element and the drive plate assembly.

In addition, in the motorcycle with the speed change mechanism of the present invention, by reducing the distance between the drive shaft and the driven shaft, the size and weight of the drive mechanism and the speed change mechanism are reduced, thereby achieving light weight and compact space. effect.

In some embodiments of the present invention, without affecting the speed change characteristics between the drive disk assembly and the driven disk assembly, the optimal vehicle space configuration is achieved, and the space compactness is further improved.

In some embodiments of the present invention, due to the space configuration between the rear wheel and the drive mechanism, the space compactness can be further improved and the overall size of the vehicle can be reduced.

In some embodiments of the present invention, the size and weight of the driving mechanism are reduced by the design of the coaxial line of the driven shaft and the transmission shaft, so as to reduce the weight of the vehicle, and further improve the compactness of the space. sex.

In some embodiments of the present invention, since the driving mechanism is fixed on the vehicle body, the load of the suspension system can be reduced, and the riding feeling and operation can be better.

Description of drawings

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, wherein:

1 is a partial cross-sectional view illustrating a known drive disk assembly;

FIG. 2 is an incomplete partial side view illustrating an embodiment of a motorcycle with a shifting mechanism of the present invention;

Figure 3 is an incomplete partial cross-sectional view illustrating a drive mechanism of this embodiment;

Figure 4 is a fragmentary sectional view illustrating a shifting mechanism of this embodiment;

Figure 5 is a fragmentary cross-sectional view illustrating part of the structure of a drive plate assembly of the transmission; and

FIG. 6 is a schematic diagram illustrating the interlocking relationship between the balls of the drive plate assembly and the sliding plate.

List of reference signs

2...body

3...Drive Mechanism

31・・・Driver

32・・・Drive shaft

4...Transmission mechanism

41・・・Housing

42・・・Drive Disk Assembly

420・・・Slots

421・・・First fixed plate

422・・・Sleeve

423・・・Sliding disc

424・・・Second fixed disk

425・・・ Ball

426・・・Arc

427•••••••••••••••••••••••••••

43・・・Driver plate assembly

431・・・Driver

432・・・Slave shaft

433・・・Inner arc

44···Variable transmission parts

45・・・Drive shaft

46・・・Gear assembly

5……Rocker arm mechanism

51・・・Rocker arm

52·····Flexible transmission parts

6.....Rear wheel

C1, C2, C3 axis line

C4・・・Auxiliary line

D1 · · · Front and rear direction

D2・・・Left and right direction

L2・・・Axis

L3・・・Tangent

S...Scroll line segment

W······wheelbase.

Detailed ways

Referring to FIG. 2 to FIG. 5 , it is an embodiment of a motorcycle with a speed change mechanism of the present invention. This embodiment includes a vehicle body 2 , a drive mechanism 3 disposed on the vehicle body 2 , a speed change mechanism 4 connected to the drive mechanism 3 , a rocker mechanism 5 connected to the drive mechanism 3 , and a rocker mechanism 5 connected to the drive mechanism 3 . The rear wheel 6 of the arm mechanism 5 . Among them, in this embodiment, for the convenience of description, some vehicle components, such as front wheels, exhaust pipes, etc., are omitted. To avoid confusion, FIG. 3 shows only some of the elements in section.

A front-rear direction D1, a left-right direction D2 perpendicular to the front-rear direction D1, and an axis L2 extending along the left-right direction D2 and perpendicular to the front-rear direction D1 and passing through the vehicle body 2 are defined.

This embodiment is not limited to the structure and shape of the vehicle body 2 , as long as the driving mechanism 3 can be provided. In addition, FIG. 2 omits part of the structure of the vehicle body 2 and other components such as the rocker arm mechanism 5 and the rear wheel 6 , etc., thereby simplifying the illustration to express the relative position of the driving mechanism 3 .

The driving mechanism 3 is fixed on the vehicle body 2 and is preferably a stationary engine, but this embodiment is not limited thereto. The driving mechanism 3 includes a driving member 31 disposed on the vehicle body 2, and a driving shaft 32 connected to the driving member 31 and extending along the axis L2. In this embodiment, the driving member 31 is composed of a cylinder and a crankcase, but it is not limited to this, as long as it is used to push the driving shaft 32 to rotate, and it can also be an electric driving element. The drive shaft 32 is a crankshaft, and can be driven by the drive member 31 to rotate with the axis L2 as a rotation axis.

The speed change mechanism 4 includes a casing 41 disposed on one side of the drive mechanism 3 along the left-right direction D2, a drive plate assembly 42 set on the drive shaft 32 and rotatable around the axis L2, A driven disk assembly 43 located behind the drive disk assembly 42 at intervals along the front-rear direction D1, a driven disk assembly 42 connected to the driven disk assembly 43 and driven by the drive disk assembly 42 to link the driven disk assembly 42 A transmission member 44 for rotating the disc assembly 43 , a transmission shaft 45 located behind the drive shaft 32 along the front-rear direction D1 and arranged side by side with the drive shaft 32 , and a drive shaft 45 connecting the driven disc assembly 43 and the drive shaft 45 . Gear assembly 46 . In order to avoid confusion, FIG. 4 omits the casing 41 , and FIG. 5 only shows a part of the structure of the drive disk assembly 42 for the convenience of description. For the convenience of description, an axis line C1 extending through the axis of the drive shaft 32 and an axis line C2 extending through the axis of the transmission shaft 45 are defined. Wherein, since the axis C1 and the axis L2 of the drive shaft 32 are almost coincident, in order to avoid confusion, only an imaginary line is shown in the figure to represent the axis C1 and the axis of the drive shaft 32 at the same time. Axis L2.

The drive plate assembly 42 is disposed in the casing 41, and has a first fixed plate 421 that is annular around the axis L2, a first fixed plate 421 pressed against the first fixed plate 421 and extended along the axis L2 for the A ring sleeve 422 through which the drive shaft 32 passes, a sliding plate 423 slidably sleeved on the ring sleeve 422, a second fixing plate 424 connected to the ring sleeve 422 and spaced from the sliding plate 423, and a plurality of The balls 425 are disposed between the first fixed plate 421 and the sliding plate 423 and used to push against the balls 425 of the sliding plate 423 . In this embodiment, the first fixing plate 421 is preferably a pressure plate, and is fixed on the driving mechanism 3 , but not limited to this, as long as there is no relative movement between the driving mechanisms 3 . The sliding plate 423 has a plurality of arc surfaces 426 facing the first fixed plate 421 and cooperating with the first fixed plate 421 to define a plurality of accommodating grooves 420 for the balls 425 to move respectively, and an opposite to the The arc surface 426 faces the second fixed plate 424 and is in contact with the outer ring surface 427 of the speed change transmission member 44 . Wherein, the arc surfaces 426 surround the axis L2 at intervals in a radial shape, so that the balls 425 are evenly arranged on the sliding plate 423 to achieve better rotational stability. The outer annular surface 427 gradually expands and extends in the radial direction along the direction away from the second fixing plate 424, and is inclined to the axis L2. The second fixed plate 424 is preferably a fan plate, and is fixed on the casing 41 , but not limited to this, as long as it can not move relative to the first fixed plate 421 . The second fixed plate 424 faces the outer surface of the sliding plate 423 and is inclined in the opposite direction to the outer annular surface 427 .

It should be particularly noted that, from the perspective of the circumferential direction, each arc surface 426 is formed by two rolling line segments S that are connected in sequence along the radial direction and have different radii of curvature. In this embodiment, the radius of curvature of the rolling line segment S close to the axis L2 of each arc surface 426 is smaller than the radius of curvature of the rolling line segment S far from the axis L2, but not limited to this, as long as the adjacent The radii of curvature of the two rolling line segments S only need to be different from each other. In each arc surface 426, a tangent L3 is defined at the junction of two adjacent rolling line segments S, and the tangent L3 is the common tangent of the rolling line segments S, so that there is no step difference between the rolling line segments S, which can be It ensures the continuity of shifting, and avoids shifting problems caused by the balls 425 being stuck, thereby improving durability. In this embodiment, the number of the rolling line segments S in each arc surface 426 is not limited, and each arc surface 426 may also be composed of at least three rolling line segments S and form at least two common tangents. The curvature radii of the two adjacent rolling line segments S are different from each other, and the curvature radii of the rolling line segments S of each arc surface 426 gradually increases away from the axis L2 in the radial direction. Furthermore, the curvature radii of the rolling line segments S closest to the axis L2 are smaller than the curvature radii of the rolling line segments S farther from the axis L2 in the radial direction, so that the effect of the present solution can be achieved.

The driven plate assembly 43 is disposed in the housing 41 and has two driven plates 431 with adjustable distances from each other, and a driven plate 431 parallel to the drive shaft 32 and passing through the driven plates 431 and connected to the gear The driven shaft 432 used to drive the transmission shaft 45 to rotate by the assembly 46 . Wherein, for the convenience of description, an axis line C3 passing through the axis of the driven shaft 432 is defined, and an axis line C3 extending along the left-right direction D2 and side by side with the axis line C3 of the driven shaft 432, and passing through the axis line C3 of the driven shaft 432 is defined. The moving plate 431 is close to the auxiliary line C4 of the leading edge of the axis L2 along the front-rear direction D1. Each driven disk 431 has an inner arc surface 433 that faces the other driven disk 431 and tapers toward the other driven disk 431 . It should be noted that the distance from the axis C3 of the driven shaft 432 to the auxiliary line C4 along the front-rear direction D1 is greater than the distance from the axis C1 of the driving shaft 32 to the auxiliary line along the front-rear direction D1 The distance of C4 further enhances the space compactness of the transmission mechanism 4 .

The speed change transmission member 44 is preferably a transmission belt, but not limited thereto. The speed change transmission member 44 extends along the front-rear direction D1 and is disposed between the outer annular surface 427 of the sliding plate 423 and the second fixed plate 424 and between the inner arc surfaces 433 of the driven plates 431 . Wherein, the speed change transmission member 44 is driven by the drive plate assembly 42 to rotate, and at the same time drives the driven plate assembly 43 to rotate, thereby achieving the effect of transmission. In this embodiment, the inclined design of the inclined outer annular surface 427 , the outer surface of the second fixed plate 424 , and the inner arc surfaces 433 enables the speed change transmission member 44 to be pushed by the sliding plate 423 . squeeze, and move closer to or away from the axis L2 along the radial direction of the drive disk assembly 42, and drive the distance between the inner arc surfaces 433 to become smaller or larger, thereby adjusting the vehicle speed gear and reduction ratio.

Wherein, the distance from the axis C1 of the drive shaft 32 to the axis C3 of the driven shaft 432 along the front-rear direction D1 is defined as a wheelbase W, and the wheelbase W is 130-150mm, preferably 145mm. Affected by the product specifications in the market, if the wheelbase W is less than 130 mm, the wheelbase W will be too short, resulting in the problem of mutual interference between the driving disk assembly 42 and the driven disk assembly 43 . In order to solve the interference problem, the size of the drive disk assembly 42 and the driven disk assembly 43 must be reduced, which will inevitably sacrifice part of the speed change characteristics, resulting in poor acceleration. If the wheelbase W is greater than 150mm, the wheelbase W will be too long, which will inevitably increase the length of the speed change transmission member 44, which will easily cause vibration and flapping, and also increase the size and weight of the drive mechanism 3. And indirectly shorten the length of the rocker arm mechanism 5, resulting in reduced controllability. And when the wheelbase W is 145mm, not only can the speed change characteristics between the drive plate assembly 42 and the driven plate assembly 43 be maintained, but also the volume and weight of the drive mechanism 3 and the speed change mechanism 4 can be reduced to achieve a higher optimal space configuration. In addition, it should be noted that the axis line C3 of the driven shaft 432 coincides with the axis line C2 of the transmission shaft 45, so as to reduce the distance between the drive mechanism 3 and the speed change mechanism 4 without affecting the transmission performance. The size and weight make the overall structure of this embodiment more compact. In addition, the trailing edges of the driven discs 431 are located behind the trailing edge of the gear assembly 46 along the front-rear direction D1 , which further increases the space for the vehicle to facilitate the installation of other components and achieves a compact effect.

The gear assembly 46 is preferably, but not limited to, a wet reduction gear set, and can be driven by the driven shaft 432 to drive the transmission shaft 45 to rotate, and make the rotation speed of the transmission shaft 45 different from that of the driven shaft 432 speed.

The rocker mechanism 5 includes two rocker members 51 that connect the rear wheel 6 and the driving mechanism 3 and can swing up and down relative to the vehicle body 2 , and a rocker 51 that connects the transmission shaft 45 and the rear wheel 6 and can drive the The flexible transmission member 52 for the rotation of the rear wheel 6 . In this embodiment, the number of the rocker arm members 51 is not limited, and it can also be one rocker arm member 51 . The flexible transmission member 52 is selected from a belt or a chain, but is not limited thereto.

The front edge of the rear wheel 6 close to the driving mechanism 3 is located between the front edge and the rear edge of the driven plate 431 along the front-rear direction D1, so that the overall spatial structure of this embodiment is more compact.

Referring to FIG. 3 , FIG. 4 and FIG. 6 , when the rotational speed of the drive shaft 32 starts to increase from zero, the balls 425 are affected by centrifugal force, and move along the arc surfaces 426 to the radial direction of the sliding plate 423 respectively. move outwards in a direction. Since the radius of curvature of the rolling line segment S adjacent to the axis L2 of each arc surface 426 is relatively small to exhibit a large curvature, and is relatively steep outward in the radial direction, the corresponding ball 425 moves in the radial direction At the same time, the moving range along the left-right direction D2 is relatively large, and pushes the sliding plate 423 to move greatly along the axis L2 toward the second fixed plate 424, so as to rapidly shrink the sliding plate 423 and the second fixed plate 424. By fixing the distance between the discs 424, the speed change transmission member 44 can be expanded outward along the radial direction of the sliding disc 423, so that the gear can be quickly increased to have better acceleration and avoid the problem of too slow starting speed. occur. Next, when the rotational speed of the drive shaft 32 is high, each ball 425 passes through the rolling line segment S of the corresponding arc surface 426 close to the axis L2, and starts at the arc surface 426 away from the axis L2. Scroll line segment S to move. Since each arc surface 426 has a larger radius of curvature of the rolling line segment S away from the axis L2 to exhibit a smaller curvature, and is relatively gentle along the radial direction of the sliding plate 423 , the corresponding balls 425 move radially When the direction moves, the moving range in the left-right direction D2 is small, resulting in a small moving range of the sliding plate 423 along the axis L2, which is bound to ease the outward expansion of the speed change transmission member 44 along the radial direction of the sliding plate 423. speed, thereby adjusting the shifting curve and reducing fuel consumption. Therefore, by means of the rolling line segments S with different curvature radii, the present embodiment can match the thrust and acceleration requirements required by high speed and low speed, thereby further improving the speed change capability.

It should be noted that, if the product on the market shortens the wheelbase W, although the relevant dimensions of the speed change mechanism 4 can be compacted, it is easy to affect the speed change performance and cause many problems. The clamping force exerted by the assembly 42 on the speed change transmission member 44 is insufficient, which may easily cause problems such as slippage of the speed change transmission member 44 or sluggish starting response. Conversely, when the setting of the clamping force of the speed change transmission member 44 is increased, although the aforementioned problems caused by starting acceleration can be overcome, the clamping pressure of the speed change transmission member 44 occurs at medium or high speed. If the load is too large, the structure of the speed change transmission member 44 will be damaged and easily broken, or the acceleration response will be slow at high speed, and the like. Therefore, in order to overcome the above problems, the present embodiment only needs to use the multi-curvature radius speed change characteristics generated by the arc surfaces 426 to adjust the linkage between the drive plate assembly 42 and the speed change transmission member 44 in multiple stages. relationship to meet different acceleration needs. Specifically, when the present embodiment is at a low speed, the rolling line segment S with the smaller radius of curvature of each arc surface 426 is matched to greatly push the sliding plate 423 to generate a larger initial thrust, thereby increasing the The clamping force of the drive disk assembly 42 achieves a quick start and improves the speed change responsiveness. When the present embodiment reaches a medium speed or a high speed, the rolling line segment S with the larger radius of curvature of each arc surface 426 is matched, so as to ease the movement of the sliding plate 423 and have a more appropriate acceleration performance, and can reduce the wear of components and fuel consumption, which in turn increases durability.

In addition, it should be noted that, because the wheelbase W of this embodiment is shorter than that of the products on the market, it can not only match the models with high power ratio, but also reduce the size of the drive mechanism 3 and the speed change mechanism 4 accordingly, so as to achieve The effect of reducing vehicle weight and improving space compactness. Furthermore, due to the compactness of the transmission mechanism 4, the wheelbase of the front and rear wheels of the vehicle can be shortened, so that the turning radius of the vehicle can be shortened, thereby improving the maneuverability and making the vehicle more flexible. In addition, due to the arrangement between the drive mechanism 3 and the rocker mechanism 5 in this embodiment, the suspension system (not shown) connecting the rear wheel 6 only needs to load the rocker mechanism 5 and the rear wheel The load of 6 is sufficient, so the riding feeling and operability can be improved.

To sum up, the speed change mechanism and the motorcycle with the speed change mechanism of the present invention provide different speed changing capabilities by virtue of the structural design that each arc surface 426 has a plurality of rolling line segments S with different curvature radii. The acceleration requirements of high-speed gears and low-speed gears can also overcome the problems caused by the smaller wheelbase W, achieve light weight, and further improve the space compactness of the vehicle, so it can indeed achieve the purpose of this utility model. .

The above descriptions are merely examples of the present invention, which cannot limit the scope of the present invention. Any simple equivalent changes and modifications made according to the claims of the present invention and the contents of the description still belong to the present invention. covered by the new patent.

Claims (13)

1. A speed change mechanism, suitable for being arranged on a vehicle body, and comprising: A drive plate assembly rotates around an axis, and has a first fixed plate that is suitable for being fixed on the vehicle body and is annular around the axis, a first fixed plate that is pressed against the first fixed plate and A ring sleeve extending along the axis, a sliding plate slidably sleeved on the ring sleeve, a second sleeve suitable for being fixed on the vehicle body and connected to the ring sleeve and spaced from the sliding plate. Two fixed disks, and a plurality of balls disposed between the first fixed disk and the sliding disk and used to push against the sliding disk, the sliding disk has a plurality of balls facing the first fixed disk, and Cooperating with the first fixed plate to define a plurality of arc surfaces respectively for the movement of the plurality of balls, it is characterized in that, from the perspective of the circumferential direction, each arc surface is composed of a plurality of arc surfaces along the radial direction. It is composed of sequentially connected rolling line segments, and the curvature radii of two adjacent rolling line segments are different. 2 . The speed change mechanism according to claim 1 , wherein in each arc surface, at least one tangent line located at the junction of two adjacent rolling line segments is defined, and the at least one tangent line is the corresponding The common tangent of multiple scroll segments. 3 . The speed change mechanism according to claim 1 , wherein the curvature radius of the rolling line segment closest to the axis in each arc surface is greater than that of the rolling line segment farther from the axis in the radial direction. 4 . The radius of curvature is even smaller. 4 . The speed change mechanism according to claim 1 , wherein the plurality of arc surfaces are spaced apart from each other and arranged annularly with the axis as a center. 5 . 5 . The speed change mechanism of claim 1 , further comprising a driven plate assembly spaced apart from the drive plate assembly in a direction perpendicular to the axis, and a drive plate assembly connecting the drive plate assembly with the drive plate assembly. 6 . The driven disk assembly is used for a speed change transmission member driven by the driving disk assembly to drive the driven disk assembly to rotate. 6 . The speed change mechanism according to claim 5 , wherein the sliding plate further has a surface facing the second fixed plate and extending in a radial direction in a direction away from the second fixed plate, and The outer ring surface is in contact with the speed change transmission member, and the speed change transmission member is located between the outer ring surface and the second fixed plate. 7. A motorcycle with the speed change mechanism according to claim 5 or 6, defining an extension direction perpendicular to the axis and extending front and rear directions, the motorcycle with the speed change mechanism comprising: a body; A driving mechanism is arranged on the vehicle body, and includes a driving member arranged on the vehicle body, and a driving member connected to the driving member and extending along the direction of the axis and capable of rotating with the axis as a rotation axis the drive shaft; The speed change mechanism is connected to the drive mechanism, and includes the drive plate assembly sleeved on the drive shaft and rotatable with the axis as the axis of rotation, and the drive plate assembly spaced from the drive plate assembly along the front-rear direction. The driven disc assembly, the transmission member connecting the drive disc assembly and the driven disc assembly, a drive shaft parallel to the drive shaft, and a drive shaft connecting the drive shaft and the driven disc assembly A disk assembly, and a gear assembly used to drive the transmission shaft to rotate, the driven disk assembly has two driven disks whose distance from each other can be adjusted, and a driven disk that is parallel to the drive shaft and passes through the plurality of driven disks. a driven shaft connected to the gear assembly to drive the transmission shaft to rotate, characterized in that the trailing edges of the plurality of driven disks are located on the trailing edge of the gear assembly along the front-rear direction The distance from the leading edge of the plurality of driven disks to the axis line of the driven shaft is greater than the distance from the leading edge of the driven disk to the axis line of the drive shaft. 8 . The motorcycle with a speed change mechanism according to claim 7 , wherein the distance from the axis line of the drive shaft to the axis line of the driven shaft in the front-rear direction is 130-150 mm. 9 . 9 . The motorcycle with a speed change mechanism according to claim 8 , wherein the distance from the axis line of the drive shaft to the axis line of the driven shaft along the front-rear direction is 145 mm. 10 . 10 . The motorcycle with a speed change mechanism according to claim 7 , further comprising a rear wheel located behind the driving member, and the front edge of the rear wheel is located along the front-rear direction from the rear wheel. 11 . between the leading and trailing edges of the disc. 11 . The motorcycle with a speed change mechanism according to claim 10 , further comprising a rocker mechanism, the rocker mechanism comprising at least one rocker member connected to the rear wheel, and a rocker member connected to the rear wheel. 12 . The transmission shaft is connected to the rear wheel, and can drive the rear wheel to rotate. Different speed from the transmission shaft. 12 . The motorcycle with a speed change mechanism according to claim 11 , wherein the flexible transmission element is selected from a belt or a chain link. 13 . 13 . The motorcycle with a transmission mechanism according to claim 11 , wherein the driving mechanism is fixed to the vehicle body. 14 .

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